We discover several magnetic Feshbach resonances in collisions of ultracold 39K atoms, by studying atom losses and molecule formation. Accurate determination of the magnetic-field resonance locations allows us to optimize a quantum collision model for potassium isotopes. We employ the model to predict the magnetic-field dependence of scattering lengths and of near-threshold molecular levels. Our findings will be useful to plan future experiments on ultracold 39K atoms and molecules.
Feshbach resonances in ultracold 39K / C. D’Errico; M. Zaccanti; M. Fattori; G. Roati; M. Inguscio; G. Modugno; A. Simoni. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - STAMPA. - 9:(2007), pp. 223-223.
Feshbach resonances in ultracold 39K
ZACCANTI, MATTEO;FATTORI, MARCO;ROATI, GIACOMO;INGUSCIO, MASSIMO;MODUGNO, GIOVANNI;
2007
Abstract
We discover several magnetic Feshbach resonances in collisions of ultracold 39K atoms, by studying atom losses and molecule formation. Accurate determination of the magnetic-field resonance locations allows us to optimize a quantum collision model for potassium isotopes. We employ the model to predict the magnetic-field dependence of scattering lengths and of near-threshold molecular levels. Our findings will be useful to plan future experiments on ultracold 39K atoms and molecules.
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